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May 31

Day 152 of 366 · ISO week 22 · Gemini · Spring (Northern Hemisphere)

May 31 is the 152nd day of the year in the Gregorian calendar; 214 days remain until the year's end. It falls in spring (northern hemisphere) and under the astrological sign of Gemini.

Day of year
152
Days remaining
214
ISO week
22
Zodiac
Gemini
Season
Spring
Sun declination
+22.0°

External references

Curated jump-off points to the major almanacs, encyclopaedias and primary sources for this date.

Wikipedia: this day →Britannica: this day →LoC: Today in History →History.com: this day →On-This-Day.com →BBC: On This Day →NYT: this day →Time and Date →NASA APOD archive →U.S. Naval Observatory →Wolfram|Alpha →Wikidata →Google Books →JSTOR →Internet Archive →
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Astronomy

Solar declination through the year — the Sun's apparent latitude on Earth. May 31 ≈ +22.0°
+23° −23° +22.0°
Computed via Cooper's formula. Positive declination = Sun north of the celestial equator (Northern Hemisphere summer).

On May 31 the Sun's declination is approximately +22.0°. At this latitude the Sun is north of the celestial equator, giving the Northern Hemisphere longer days than nights.

For specific rise/set times at your location, see the U.S. Naval Observatory, or the NASA APOD archive for any imagery published on a May 31.

Position in the year

Position in the calendar year — day 152 of 366 (with 214 remaining)
JanFebMarAprMayJunJulAugSepOctNovDec May 31

Holidays & observances

No widely-observed holidays catalogued for this day in our base set. See the external almanacs above for region-specific observances.

Events

A selection of widely-documented historical events that took place on this date. Years marked BCE follow standard astronomical convention.

Notable births

Notable deaths

Numerical & calendrical curiosities

Day-of-year (152)2^3 × 19 · composite (no)
Days remaining (214)2 × 107
Date code DDMMYYYY31052026 · no palindrome in next 200 years
Sun declination+22.03° (Cooper approximation)
Distance from solstice20 days

Cross-references

The 31st of every other month

Adjacent days

Days nearby

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